The number of migrants crossing the Mediterranean is down from its peak in 2015 with nearly 32,000 migrants estimated to have arrived in Europe by sea so far this year. Of that, more than 650 have died.

The UN said 2016 was the deadliest year on record in the Mediterranean sea even though the number of migrants making the trip was down on the year before. Arrivals in Italy increase during May and usually peak in July when conditions at sea tend to be better.